Lathe for turning crank-pins.



N0. 683,68l. Patented Dec. l0, l90l.

A. PETERSON & ,F. 300mm. LATHE FOR TURNING CRANK PINS.

(Application filed June 10, 1901.)

(No ModeL) Witnesses a. ewamg Tn: Nonms wztzns coy. PHoTo-m'fio" WASHINGTON. o. c. 3

2 Sheets-Shem: I. q

No. 688,68l. Patented Dec. l0, [90L A. PETERSON &. F. BOUBEN. LATHE FUR TURNING GRANK PINS.

(Application filed June 10, 1901. (No Model.) 2 Sheets-8heei 2.

rnnn 351 i: g MMw n M (2 tvM QS St. Louis and State of Minnesota, have into such as will enable others skilled in the art to proved mechanism for upon, part of the crank-arms and all of the to be hereinafter referred to.

parts will be indicated by the same reference- UNITED STATES PATENT EEICE.

AUGUST PETERSON AND FRANK BOOREN, OF DULUTH, MINNESOTA.

LATHE FOR TURNIN G CRANK-PINS.

SPECIFICATION forming part of Letters Patent No. 688,681, dated December 10, 1901.

Application filed June 10,1901- To all whom it may concern:

Be it known that we, AUGUST PETERSON and FRANK BOOREN, citizens of the United States, residing at Duluth, in the county of vented certain new and useful Improvements in Lathes for Turning Crank-Pins; and we do hereby declare the following to be a full, clear, and exact description of the invention,

which it appertains to make and use the same.

This invention is in the nature of a machine for turning up crank or wrist pins without removing them from their shafts.

The object of the invention is to provide, in a machine of this class, improved means for centering and securing the crank-pin and its shaft in position to be operated upon by a revolving cutting tool provided with improperly mounting the cutting-tool and feeding it longitudinally along the crank pin, whereby the whole length of the pin is turned up true without, as before stated, the necessity of removing it from the shaft.

In the accompanying drawings, in which our improved machine is illustrated, Figure 1 represents the machine in front elevation with the crank-pin in position to be operated crank-shaft being broken away. Fig. 2 represents a transverse sectional view taken on the plane indicated by the dotted line 2 2 of Fig. 1 looking to the left, as indicated by the arrow. Fig. 3 represents a view, partly in section on the plane indicated by the dotted line 3 of Fig. 2 and partly in elevation, ends of the tie-rod and crank-pin being broken away. Fig. 4 represents a View in perspective of a modified form of clamp mechanism, Fig. 5 is a transverse sectional view taken on the same plane as Fig. 2, showing slightly-modified means for driving the tool at different speeds. Fig. 6 is a view of the construction shown in Fig. 5 in front elevation, the same parts being broken away as in Fig.1.

Wherever the same parts occur in more than one of the figures of the drawings such numerals.

The machine comprises two end clamping- Serialllo. 63,944. (No model.)

plates 5 and 6, braced and held in position by tie-rods 7, 8, and 9, provided with tightening-nuts 10 for forcing the plates against the crank-arms 11 11, additional security in holding the machine on the crank-arms being had, ifdesired, byset-screws (not shown) threaded through the plates and bearing against the outer faces of the cran k-ar1ns.

12 indicates an exterior collar in two parts 12 and 12 hinged together at 13, the part 12 being provided with radially-slotted lugs 14 and 15, and part 12 being formed with a similar slotted lug 16, and in the said slots in which are seated bushings 17 through which pass the tie-rods 7, 8, and 9, upon which rods the exterior collar and all'conradial slots, as 14, as indicated by dotted lines in Figs. 1 and 6 of the drawings,are also preferably provided in the clamping-plates 5 and 6, whereby rods 7, 8, and 9 may be moved laterally toward a common center and held in a given position by means of nuts 10. The collar 12 is also provided with lugs 18 and 19, bored tangentially to receive a wormshaft 20, the lug 18 being also slotted to accom modate the worm 21 on shaft 20 and both lugs being provided with lateral ears 22 to receive bolts 23, for securing the parts 12 and 12 of the collar together. The wormshaft is provided with a crank handle 24 for the application of manual power to turn the shaft; but a pulley to receive a suitable belt from a driven shaft may be substituted for i the crank-handle when the application of machine power is required.

Within the collar 12, in its inner periphery, is provided an annular groove to receive an annular tongue 25 on the outer periphery of a loose ring 26, made in two or more parts to fa cilitate its adjustment into position, said ring being also provided with an interior annular groove to accommodate the teeth 27 of a geartoothed ring 28, also made in two or more parts for reasons before stated.

In one face of the toothed ring 28 is a radial groove or recess to accommodate the cut ting-tool 30, the tool being secured in said groove by means of a lock-plate 31, seated in a transverse recess in the same face of the toothed ring, said plate being clamped upon the ring and threaded into the lock-plate, the

head of the bolt being countersunk into the opposite face of the ring.

Straddling the upper edge of collar 12 is a split and bifurcated block 33, clamped upon the collar by a bolt 34, a similar block being clamped upon the upper edge of clamping-plate 6 by a bolt 36. A feed-screw 37, having a hand-wheel 38, (or it might be provided with means for receiving power, such as a belt-pulley or cog-wheel,) is threaded through block 35 and swiveled in block 33, whereby by turning said screw the cuttingtool and its supporting and actuating parts may be fed longitudinally along the tie-rods 7, 8, and 9, so as to bring the tool to bear upon the whole length of the crank pin. The crank-pin to be turned is indicated at 39, and the aperture of toothed ring 28 is large enough to leave a free space all around the pin. The ring 26 is slotted to permit the teeth of the worm to engage the teeth of the toothed ring.

We assemble the machine parts in operative position by passing the tie-rods 7, 8, and 9 through the bushing of the exterior collar 12, next assembling the parts of the rings 26 and 28 on either side of the crank-pin 39 and bring the ends of the respective rings together, next clamping the exterior collar 12, next securing the ends of the tie-rods in the clampplates, and finally tightening up the tie-rods against the clamping-plates. The machine will then slide on the tie-rods, and the rings 26 and 28 will be free to revolve about said crank-pin under the impulse of the worm. We now insert and adjust and lock the cutting-tool in the side of the toothed ring, with the edge bearing on the crank-pin, and revolve the ring about the crank-pin (thus carrying the cutting-tool around the crank-pin) by means of the worm, at the same time sliding the Whole machine transversely on the tierods by means of the feed-screw.

In the modification illustrated in Fig. 4 the only change is in the means for clamping the work, this construction being intended to be applied to clamp parts which lie parallel instead of (as with the crank-arms) at right angles thereto-such, for instance, as a gangsaw head. In this figure, 40 indicates the gang-saw head, and 41 the shaft to be turned.

To clamp the head, we provide clamp=bows 42, respectively provided with peripheral lugs 43 to receive the tie-rods 44 and near their ends with radial set-screws 45 to bear against the gripped head, such screws being of sufficient length to accommodate varying thicknesses of object-s to be gripped. Said bows 42 are also provided on one or both sides with brace members 46 to bear on the edge of the gripped head to prevent lateral displacement of the clamp, set-screws 47 being provided in the brace members to bear upon the edge of the gripped head and to provide for engaging varying heights of heads.

In the modified form of driving mechanism shown in Figs. 5 and 6 the tangentially-bored lug 18 is. extended, as at 18, and the similarly-bored lug 19 is omitted and a pivoted bearin g-lu g 19 substituted therefor. Instead of the rigid full-length worm-shaft 20, carrying the worm 21 and crank-handle 24, there is provided a short worm-shaft 20, j ournaled in the same manner as worm-shaft 20 in Figs. 1 and 2 and carrying a similar Worm 21*, said shaft 20 terminating just outside of lug 18 in one member of a universal joint 48, the other member of said joint being carried at the inner end of another section 20 of shaft journaled in the pivoted lug 19 and carrying at its outerend the crank-handle 24*. In a recess in lug 18*, secured upon shaft-section 20, is a pinion 49, with which engages a gearwheel 50, secured in the same recess on a short shaft 51, journaled in said lug and carrying at its outer end a member-of the universal joint similar to the member carried on shaft-section 20 When the shaft-sections 20 and 20 are coupled together by connecting up the universal joint,turning the crankhandle will operate the worm and its connections to and including the cutting-tool the same as in the construction illustrated in Figs. 1 and 2, but when the shaft-section 20 is connected (by coupling up the members of the universal joint) with short shaft 51, as shown in dotted lines in Fig. 5, the turning of crank-handle 24* will cause the tool tobe moved at a difierent rate of speed, the rate to be determined by the relative sizes of the pinion 49 and the gear-wheel 50. The pivotal bearing-lug 19 as clearly shown in full and dotted lines in Fig. 5, will accommodate itself to either position of shaft-section 20, as before described.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent of the United States, is

1. In a machine of the class described, the combination with end clamping membersprm vided with radial slots, and tie-rods radially adjustable in said slots, of an exterior collar similarly provided with radially-slotted peripheral lugs, through which slots said tierods pass, a cutting-tool carried in said collar, and means for revolving the tool around the crank-pin to be turned up, substantially as described.

2. In a machine of the class described, the combination with end clamping members provided with radial slots, and tie-rods carried in said slots, of an exterior collar provided through which slots said tie-rods pass, a loose 1 ring in a plurality of parts mounted to rotate in said collar and slotted as described,a cogged ring in a plurality of partsmounted in the loose ring, a worm-shaft journaled in the exterior collar, and a worm on said shaft, the teeth of which project through the slot of the loose ring to engage the teeth of the toothed ring, substantially as described.

4. In a machine of the class described, the combination with end clamping members and tie-rods securing said members together, of an exterior collar similarly provided with slotted peripheral lugs through which said tierods pass, a loose ring in a plurality of parts mounted to rotate in said collar and slotted as described, a cogged ring in a plurality of parts mounted in the loose ring, a Worm-shaft journaled in the exterior collar, a Worm on said shaft, the teeth of which project through the slot of the loosering to engage the teeth of the toothed ring, said worm-shaft being in two sections bearing the members of a universal shaft, a pinion on the inner section of the Worm-shaft, a short shaft bearing one section of the universal shaft atits outer end and adapted to be coupled with the outer section of the worm-shaft, and a pinion or gear of different size from and engaging with the pinion on the inner section of the worm-shaft, substantially as described.

'5. In a machine of the class described, the combination with clamping members and rods securing the same together, of an exterior collar slidably mounted on said rods, slots be ing formed in said collar for receiving said rods,said collar being provided with a grooved inner periphery, an inner ring provided with an annular tongue adapted to engage the groove of said collar and also provided with a groove on its inner face, a ring provided with teeth on its outer periphery rotatably mounted within the groove of said inner ring, means carried by said toothed ring for supporting a cutting-tool, a Worm-gear mounted Within said exterior collar and meshing with the teeth of said toothed ring, and a shaft adapted to rotate said worm-gear mounted transversely of said collar and carried there by, substantially as described.

In testimony whereof we hereunto affix our signatures in presence of two Witnesses AUGUST PETERSON, FRANK BOOREN.

Witnesses:

JAMEs T. WATSON, STELLA O. PIERCE. 

